Printer&#39;s chase.



R. R. BUVINGER.

PRINTER'S CHASE.

APPLICATION FILEDVJUNE 451917.

Patented Jail. 28, 1919.

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INVENTDR "s am wmmuma. wuumcu N D ED STATES PATENT @FEC .RALPH REED BUVINGER, OF MERIDIAN, MISSISSPPI, ASSIGNOR TO R. HOE AND CO., OE NEW YORK, N. Y., A CORPORATION OF NEW YORK.

PRINTERS CHASE.

Specication of Letters Patent.

Patented Jan. 2s, 191e.

Application filed .Tune 4, 1917. Serial No. 172,618.

To all whom t may concern:

Be it known that I, RALPH REED BU- vINoER, a citizen of the United States, residin at Meridian, county of Lauderdale, and tate of Mississippi, have invented certain new and useful Improvements in Printers Chases, fully described and represented in the following specification and thel accompanying drawings, forming a' part of the same.

This invention relates to certain improvements in chases for flat bed printing inachines.

As usually constructed, a flat bed printing machine comprises a bed and a coperating impression cylinder, the form to be printed being carried on the bed and printed from between it and the cylinder, either the cylinder or the bed being reciprocated to effect the printing operation. As ordinarily designed, machines of this character print from forms of type which are of standard height, the type being carried in what are known as chases which are locked up to hold the type rigid, the bottom of the type resting on the bed. To provide a sufficiently strong and rigid construction, and to hold the type in the chases, the

chases are made with wide side bars or mar-` gins to afford suflicient rigidity. With this construction as ordinarily employed in printing in this class of machines, a considerable waste of paper occurs,' owing to the wide adjacent margins of the chases. If it be desired to save paper, or for other reasons to provide a chase with a narrow margin, it has been customary to reinforce the chase with a bottom for holding the type in position to secure the necessary rigidity. Where a bottom is employed, however, owing to the type beingof standard height and the arrangement of impression cylinder and bed of the machine being designed for such type, it becomes necessary to plane or cut down the bed of the machine, which is a difficult and expensive operation, requiring special heavy tools which, in many instances, are not at the command of printing shops.

It is the object of the present invention to provide an improved chase of simple design, which may be used for holding type of standard height and which is formed with a narrow margin or margins, the chase being so constructed as to avoid the use of a bottom for giving the necessary rigidity with narrow margins, thus obviating the necessity of planing or otherwise altering the bed where it is desired to use margins for saving paper or for other reasons.

Such a chase is illustrated in the accompanying drawings and will be described in connection with the same. These drawings represent, in

Figure 1 a plan view, partly in section of two forms of the improved chase, the parts being shown in the position they occupy before locking up;

Fig. 2 is a view similar to Fig. 1, the parts being shown with the type in position and locked, the figure being partially broken away, and Y Fig. 3 is a cross sectional view, broken centrally away, taken on the line 3,-3 of Fig. 1.

Referring now to the drawings, two forms of chase embodying the invention are illustrated marked A, B. These chases are used with a flat bed machine, the bed of which is indicated by the numeral 1. In accordance with the invention, the type 2, which are of standard height, are held in the chase without a bottom, the bottom ends of the type contacting with and resting on the bed 1. Chases constructed in accordance with the invention will include top and bottom sides 3 and 4 which may be, and preferably are, of the usual wide heavy construction, as shown in Fig. 1. The chase, however it may be formed, will have what may be termed a loose side, that is, a side which is movable to permit the removal and insertion of the type in the chase. rllhis loose side may be the side of the chase itself, which will preferably be the case where two or more chases are used side by side, as shown in Fig. 1 of the drawing, or it may be a movable member positioned inside the chase frame. The chase will, however, whatever its construction otherwise, have one of its sides bowed or sprung in somewhat from the perpendicular, so that when the type is inserted in the form and side locked by the movable side, the pressure of the type as a fulcrum will tend to straighten out this bow, with t-he result that, because of the bow shape, an equal pressure will be obtained against the type and the type rigidly held in position in the chase, this bow shape effecting this with a side of narrow width providing the narrow margin desired. As illustrated in the drawing, the chase B is formed with a narrow side 5 which is, as shown in its normal position when the chase is empty, bowed or sprung in from the perpendicular. The form of the chase shown marked B is provided on the opposite side with a fixed side frame 6 and a movable side piece 7, which is moved to side lock the type by means of the usual quoins 8, the movement of the side 7 through the type operating to straighten out the bow of the side 5 and through this efect the rigid holding of the type in the chase without a bottom.

In the form of chase shown marked B, the end lock up is eifected by the usual movable end' bar 9, likewise movable -to lock the type by means of the quoins 10 of any usual construction.

In the form of chase illustrated at A (Fig. 1) both sides 11, 12 of the chase are sprung or bowed in from the perpendicular. To permit the insertion or removal of the type one of the sides is movable, the movable side in the particular construction here illustrated being that marked 12. The sides 11, 12 are, as illustrated, narrow, this construction be ing permitted by the bow of the sides which provides the necessary rigidity. Various means may be employed for moving the side to side lock the type and straighten out the bows. formed at each end with lugs or extensions 13 through which pass threaded lock up bolts 14, these bolts taking into the top and bottom frames 3, l with which the chase is provided. In the best constructions, where. this chase is employed, the top and bottom frameswill be cut away to form seats 15 in which take the lugsI or extensions 13 on the movable side, the seats being of a depth slightly less than the width of the type form to be locked. This construction is provided to provide a stop for the lugs 13 as they are moved inward to straighten' the bow, these stops acting to prevent the sides from being straightened beyond the perpendicular, which, if not provided for, might, upon an undue tightening of the bolts, cause the loose side, as 12, to bend outward too far beyond the perpendicular and cause a loosening of the ltype in the chase. The end lock up in this form of chase is provided by the movable bar 16 operated from any quoins as 17 of usual construction.

In the construction illustrated in Fig. 1, chases such as A and B may be used side by side if desired. IVhere they are used in such combination, the chase B will have its thickened ends 3, l cut away to form recesses 18 at each end to receive the heads of the bolts 14: used for tightening the chase A.

Copies of this patent may be obtained for five cents each, by addressing the As shown the movable side 12 is If desired the form of locking bolt shown in Fig. 2 may be employed, in which case the recesses 18 may be omitted. V'here, however, two or more chases are used side by side the narrow adjacent sides will be bent or sprung as described to allow narrow margins without bottoms and of sufiicient rigidity.

With the construction illustrated a chase with narrow margin is provided, which affords a sufficient rigidity for the type and in which the type are locked up and equal side pressure is exerted thereon and the type held under uniform pressure in the chase, and a chase which requires no bottom support and which, therefore, can be used on the usual flat bed machines without altering the beds, these results being effected by bowing or springing both or onel of the sides of the chase. The invention has been shown in its preferredform, but it will be understood that various modifications may be effected in the form of the chase and in the means employed for locking up the loose side, without departing from the essential principles of the invention.

What is claimed is:

1. A bottomless printers chase having heavy rigid ends, -a narrow side piece bowed or sprung inwardly from a perpendicular integral with the ends, and a movable side piece and means for moving it toward the bowed side piece to cause the bowed side to assume la perpendicular through pressure of the type and eifect a rigid lock up.

A bottonilvess printers chase havingl heavy rigid ends, a narrow side piece bowed or sprung inwardly from a perpendicular integral with the ends, a narrow' movable side piece bowed or sprung inwardly from a perpendicular, and means for moving the movable bowed side piece toward the other bowed side piece to cause the side pieces to assume a perpendicular through pressure on the type and effect a rigid lookup.

3. A bottomless printers chase having heavy rigid ends, a narrow side piece bowed or sprung inwardly Afrom a perpendicular integral with the ends, a narrow movable side piece bowed or sprung inwardly from a' perpendicular, integral lugs on the movable side piece, sockets in the end pieces into which the lugs take forming stops, and adjusting' screws or bolts taking through the lugs for moving t'he movable side piece toward the other bowed side piece to cause both side pieces to assume a perpendicular through pressure on the type and eifect a rigid lookup.

In testimony whereof, I have hereunto set my hand.

RALPH REED BUVINGER.

Commissioner of Patents,

Washington, D. C. 

